A062285 Numbers with the most significant digit even and alternating parity of digits.

0, 2, 4, 6, 8, 21, 23, 25, 27, 29, 41, 43, 45, 47, 49, 61, 63, 65, 67, 69, 81, 83, 85, 87, 89, 210, 212, 214, 216, 218, 230, 232, 234, 236, 238, 250, 252, 254, 256, 258, 270, 272, 274, 276, 278, 290, 292, 294, 296, 298, 410, 412, 414, 416, 418, 430, 432, 434, 436

Offset

1,2

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Index entries for 10-automatic sequences.

Formula

(1 - A000030(a(n)) mod 2) * A228710(a(n)) = 1. - Reinhard Zumkeller, Aug 31 2013

Example

4325 is a member as the most significant digit is 4 (even) and the subsequent digits 3, 2, 5 are alternately odd and even.

Prog

(Haskell)
a062285 n = a062285_list !! (n-1)
a062285_list = filter (even . a000030) a030141_list
-- Reinhard Zumkeller, Aug 31 2013

Crossrefs

Cf. A030142, A030143.

Sequence in context: A131122 A335209 A119261 * A079206 A265342 A335661

Adjacent sequences: A062282 A062283 A062284 * A062286 A062287 A062288

Keyword

nonn,base,easy

Author

Amarnath Murthy, Jun 18 2001

Extensions

Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jun 19 2001

Offset corrected by and a(1)=0 prepended by Reinhard Zumkeller, Aug 31 2013

Status

approved